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She said the agents went through her family's personal and financial documents. "One of them even joked that maybe they would find Osama bin Laden in the basement," Mrs. Jaghlit said, fighting back tears.

Mr. Boyd would not comment on the specific instances, but said that the warrants were served "without incident."

Muslim leaders said they had consistently supported the U.S. government's war on terrorism and, as American citizens, condemned the September 11 terrorist attacks.

"It looks as if the U.S. government is declaring open season on the Muslim community and groups," said Abdulwahab Alkebsi, executive director of Islamic Institute, a D.C.-based advocacy group. "Events like these do not help us."